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A firewall is a vital component in protecting a computer system, or network of computers from external attack (typically from an internet connection). Any computer connected directly to an internet connection must run a firewall to protect against malicious activity. Similarly, any internal network must have some form of firewall between it and an external internet connection.

Enter your password when prompted. Once loaded, the security level tool should appear as follows:

This chapter has covered the basics of Fedora Linux firewall configuration.